From NASA, in this animation, the Arctic sea ice and seasonal land cover change progress through time, from September 1, 2009 when sea ice in the Arctic was near its minimum extent, through March 30, 2010. The animation plays at a rate of six frames per day or ten days per second.
Professor Cynthia de Wit of Stockholm University explains the concept of biomagnification of persistant organic pollutants in arctic marine ecosystems.
This video comes from the APECS (Association for Polar Early Career Scientists) webinar library.
Ever wonder why ice cubes float? I can tell you why ice floats in two words. Archimedes' Principle. Of course, Archimedes' Principle takes a bit more explaining. Let's make sense of it with science! This has been presented by Bayer Corporation's national education program, Making Science Make Sense.
This YouTube video lecture discusses the seasonal stratification and destratification of the world ocean, in other words, the formation of the seasonal thermocline!
Students will engage in a hands-on activity to help them consider what students in a tropical climate do to prepare for recess compared with students who live in the interior of Alaska.
Objectives
Students will:
* Compare what students in a tropical climate do to prepare for recess with students who live in the interior of Alaska.
* Learn
This activity is a way to create a cloud chamber in the classroom. A cloud chamber allows students to view "invisible" alpha particles emitted through nuclear decay. Alpha particles have a long history in nuclear physics--they are a helium nucleus and their emission during nuclear decay was one of the first ways we knew that atomic nuclei could